Halogen-free flame-retardant temperature-resistant polyolefin pyrocondensation material and preparation method thereof

Abstract

The invention discloses a halogen-free flame-retardant temperature-resistant polyolefin pyrocondensation material and a preparation scheme thereof. The material is prepared from, by weight, 20-100 parts of linear low-density polyethylene, 10-80 parts of vinyl copolymer, 0.5-5 parts of sensitizer, 5-20 parts of silicone flame retardant, 5-50 parts of inorganic flame retardant, 5-40 parts of phosphorus-nitrogen containing flame retardant, 1-5 parts of antioxidant, 1-5 parts of light stabilizer and 1-20 parts of smoke restraining agent. The halogen-free flame-retardant temperature-resistant polyolefin pyrocondensation material obtained through the preparation method can reach the high temperature resistant level of 150 DEG C or higher, is good in combustion resistant effect, can not release harmful gas, is not prone to spontaneous combustion, reduces potential safety hazards, is low in cost and high in cost performance, and can be widely applied to the fields of locomotives, aviation, electrons, ships, nuclear power, the war industry and the like.

Description

technical field [0001] The invention relates to a halogen-free flame-retardant and temperature-resistant polyolefin heat-shrinkable material and a preparation method thereof. Background technique [0002] Heat-shrinkable sleeves are widely used in electronics, locomotives, aviation, ships, nuclear power, military and other fields; there are many types of heat-shrinkable sleeves on the market, and there are different classifications according to characteristics, functions and different materials; with people's safety awareness Continuously improving, environmentally friendly flame-retardant heat-shrinkable tubes are the mainstream products in the current market; but now most 150°C grade high-temperature heat-resistant heat-shrinkable tubes generally use halogen-containing flame retardants or red phosphorus-containing flame retardants to meet flame-retardant requirements; The halogen-containing flame-retardant system releases dioxin-like first-class carcinogenic toxic gases du...

AI Technical Summary

Problems solved by technology

[0002] Heat-shrinkable sleeves are widely used in electronics, locomotives, aviation, ships, nuclear power, military and other fields; there are many types of heat-shrinkable sleeves on the market, and there are different classifications according to characteristics, functions and different materials; with people's safety awareness Continuously improving, environmentally friendly flame-retardant heat-shrinkable tubes are the mainstream products in the current market; but now most 150°C grade high-temperature heat-resistant heat-shrinkable tubes generally use halogen-containing flame retardants or red phosphorus-containing flame retardants to meet flame-retardant requirements; The halogen-containing flame-retardant system releases dioxin-like first-class carcinogenic toxic gases during the combustion process, and the red phosphorus-containing flame-retardant system releases irritating smoke during the combustion process, and it will spontaneously ignite after being rubbed and impacted during the production process. Security risks

[0003] At present, the temperature resistance grade of halogen-free heat shrinkable tubes or wires and cables on the market is mainly between 90-135°C, and it is difficult to reach 150°C. If it is to reach 150°C or above, high-priced polymer base materials such as fluorine are generally used. Plastic, but fluoroplastics are expensive, and a small amount of fluorine will be precipitated during the production of fluorine-containing plastic heat-shrinkable tubes. Employees who are exposed to fluorine-based heat-shrinkable tubes for a long time will have certain health effects